Sewing machine



Y W35. F, JENNI ,U7,63

SEWING MACHINE Filed Jan. 2, 1934 3 Sheets-Sheet 1 His Awwm F. JENN SEWING MACHINE 3 Sheets-Sheet 2 Filed Jam 1954 Patented July 9, 1935 UNITED STATES PATENT OFFICE.

SEWING MACHINE Frederic Jenni, Paris, France, assignor td'llhe Morrow Machine Company, Hartford, Conn, acorporationot Connecticut Application January 2, 19 .4, Serial No. 704,985

2 Claims. (Cl. 112--116) themaking of duplications of the results and give instructions for reproductions at any time to those skilled in. the art. v i

. The machine about to be described forms crochet stitches by the use of an eye pointed needle, a latchneedle, much like a knitting machine latch needle, feeding devices and other usual accompaniments; and, with thepresent improvements, may produce a variety of borders iro zn one continuous thread or from two or more threads, withthe supplemental'thread extending only into the enchained loops, of the primary thread at the out'enedge o f the border. The various styles or eliects displayedbdrde'rs fare accqmplishedtthrough predetermined adjustnients "di thejlength and character of 'thaieeding effects upon the material, the dDthfO the stitches into the material, the izes, qualities, colors andtensions of the thread or threads, and Qothe'rj conditionsjhence the advantage of definite records to enable operators to produce and reproduce the-desired definite results with facility. In theaccompanying drawings, forming a part of this specification;

i ural is afr n e ationof a ma hine mbodying the invention with part of the machine frame shown in section.

Figure 2,. is. a view,of a part of the machine show'n'in Fig. 1 with a frame cap removed to show mechanism for actuating the stitch formingfimplements. V

Fi'ureB is anedge view of a iramej cap and associat d par and a so h ws in ction a p o'f cainicylinders for actuating a part supported bytheframecap.

" Figure l is a plan view feed mechanism and that part of the machine partly section of frame upon which the feed mechanism is supported.

Figure 5 is an end view of partner the machine 7 frame showing also the feed mechanism illus- "trated inFig. eg art of the machine frame being shown in section] is illustrated. as applied to, a

The grooved cam cylinder Qis secured upon the Figure 6 is a detail View of a feedgear with portions of associated parts, such 'as a cam and two camrings, indicated in dotted lines,

Figure 7 is a sectionalview on line 1- -1, of Fi 6. c

Figure 8 is a sectional view on line 8-8 of Fig. 6.

[Figure 9 is a sectional view on line 9-9 of Figure 10 is a diagrammatic View of stitching, 10 showing a variety of borders.

Figure 11 is a detail View of a latch hookand a portion .of its carrier. i e .The main shaft I is journaled in the frame 2 and bears the' driving wheel 3 with its eccentric 4 :15

'whichgoperates through the connection 5; the needle lever S and needle bar l to reciprocate the eye pointed needle 8, as usual in-sewing machines.

c v main shaft I and is p'rovided with gear teeth,

which ,rnesh into similar gear teeth L on the grooved "cam cylinder ii which is supported upon the shaft. I I, the latter being journaledv in the frame 2. v a The upper grooved cam cylinder is provided with an end cam 12 to act uponia lever I3 secured to the rod Ml to oscillate the supplemental thread carrier IS with the help of the spring [6 coiled upon the rod I l. The free end of the suppleto me al t r ad car er 5 s hu mo e o and fro below the point of the needle. v V

The crochet hock li is secured to its carrierlfi,

which is" pivotal u p t d up t e sli i dove-tailed block fit, which travels in a guideway provided by the guides Etand 2| secured to the frame cap 22.

The crochet hook carrier H3 is provided with two arms 23 a d e t ertr mitie i each of which is a stud carrying an antifriction cam roll, as 25 and 2t.

Thus. the crochet hook ii is reciprocated and oscillated to move above the work around its ed e a d l w h wo k to ras th n dl thread above and below the work and interloo'p '45 the thread at theouter edge of theborde'r.

When a supplemental thread is used it is carried by the supplemental threadcarrier l5 and is enchainedwith the needle thread at theedge of the ord r but d esn net a e th fabric- [The eccentric 211s secured to the main shaft 1 and d es the. en ri co nec 28 w c is adi stably piv ed t e f d dr v nslle er 9.

whose forked .en a ts u on th p n it to. r c brorate he e d d w ch s ov l ina, cha at nel in the holder 32, which latter is acted upon through the medium of the tappet lever 33, bearing the tappet 34 and pin 35, to raise the feed dog into action upon the fabric or other material. The feed dog makes one reciprocation for each complete cycle of stitch forming and is adapted to be raised by any one of a plurality of cams (about to be described) into contact with the fabric while the needle is out of the fabric. With the fabric engaged by the raised feed dog, the latter moves to advance the fabric but in returning it moves downward, under the effect of spring 36, to clear the fabric. The feed raising cams referred to are respectively effective for feeding the material either one step for each cycle, one step for each four cycles, or one step for each eight cycles ofv stitch forming operations and means for quickly changing from any one to any other of these varieties include'the' above mentioned tappet lever 33 and parts associated therewith as will more fully appear.

The'feed gear 37 is rotatably supported upon the stud 38 and meshes with the pinion 39 on the outer end of the main shaft i. The ratio of the gearingis eight to one. The large gear bears cam 40 and cam rings 4| 'and 42, any one of which three elements may act upon thetappet '34 to raise the feed dog. The feed raisingcam 4D is secured to gear 31' and is effective to engage the 'tappet 34 and raise the feed dog and hold itin position to feed the fabric but is brought into action only once for eight full cycles of stitching,

thus permitting a cluster of eightstitches to be formed at substantially one place in the material and when the material is advanced the stitches .at the outer edge of the cluster are spread, pro.- ducing the well known shell stitch as diagrammaticallyillustrated at 43 in Fig. 10. The cam ring 4| is provided with two feed raising lobes 44 and 45, suitably spaced to produce four stitch shells as at46, Fig. I0. Cam ring 42 is provided with eight feed raising lobes as H, which raise the feed dog once for each stitch cycle and produce a plain border as at 48, Fig. 10. I a

The four stitch cam ring 4| is rotatably supported on the hub 49 of the feed gear 3'land is itself provided with a hub 50, approximately the ring 42 and upon which hub the latter mentioned cam ring is rotatably supported.

The screw 5| extends entirely through the feed gear 31 and through elongated holes in the two cam rings 4| and 42 and is threadedinto the cam 40, which is held thereby, and serves tosecure the cam rings when the screw is tightened.

The screw 52 extends through an elongated hole 53 in the feed gear 31 and engages a threaded hole in cam ring 4|, the latter being thus per- .mitted adjustment, .which may be secured by tightening this screw. I. I The screws 54 and 55 extend through elongated holesin the feed gear 31 and engage threaded holes in cam ring 42, the latter being thus .permitted adjustment which may be secured by tightening the screws. v

V The indicator 56 (in practice stamped Q for identification andrecord) is pivoted'upon the a stud 38 and held against the face of the feed gear 31 by the screw 52. The position of screw 52, established by angular adjustment of cam ring 4|, also determines the angular. position of. the

indicator 56,,and as the latter cooperates with agraduated and numbered scale on the faceof the feed-gear, meansare thus .provided whereby adjustment for length of feed 'for four stitch .claimis,-

shells (as shown at 46, Fig. 10) is indicated in a manner suitable for recording. Similarly the indicator 51 (in practice stamped U) is also pivoted upon the stud 38 and held against the face of the feed gear 31 by screws 54 and 55, to cooperate with a graduated and numbered scale on the feed gear for indicating adjustment of cam ring-42 for length of feed for plain stitching.

The tappet lever 33, carrying the tappet 34, is pivotally and bodily movable upon the stud 58 and its lateral position is controlled through the bar 59, having a projection 66 extending into a groove BI in the tappet lever 33.

The bar 59 is 'removably secured to sliding bar 62, which is controlled by the lever 63 through the connection 64.

The lever 53 is provided with a pivoted latch 65, which may look into either of the three notches in plate 6'5, which plate is in practice stamped ll -V8 respectively just above the notches."

Y I When thelatch s5 is in the left-hand notch of the plate 56, the tappet 34 is in its extreme lefthand position, where the lobes of the cam ring 42 may act upon the tappet to raise the feed dog 3| into action" to feed the fabric once for every stitch forming cycle producing stitching represented at 48, 6'! and 68 in Fig. 10.

'When the lever 63 is moved so that the latch65 locks into the center notch of the plate 65 (in practice stamped 4) the'tappett l will be in position to be acted upon bythe two lobesof cam r s! wr e th re d. do wa c n to feed the fabric once for'each four stitching cycles, and will then produce shellsof four stitches each, asishownat46 'in 'Fig. 10'.

'1 Whenthe lever. 63 moved so that the latch 65 will lock into the notch stamped 8 on the plate 66, the tappct 3 4 will be in' position to be acted upon byithe camAO to raise the feed dog 3| i nto position'to feed the fabric once for each eight stitching cycles and produce shells as represented "at 43 in Fig. 10.

" The fabric edge'guide 69 isadjustably secured tothe dove-tailfslide 10 by the screw II, which also serves as'a pivotal support for the connection :12 (in practice stamped B) which is adjustably length of the thickness of the plain stitch cam held in position upon the segment 13 by means of the thumb screw 14., which screws into a nut loosely fitted into the curved slot 15.

c The thumb screw 14 may be loosened and moved upward or downward to carry the fabric guide 69 12 indi- The pointer at the end of connection cates on the numbered scale the position of the f abric edge guide.

The primary or fundamental adjustment of [the feeding is preferably made with reference to the action ofthefeed raising cam 40 through the adjustment of the pivotal connection 16 in the slot 'i'l of the angle lever 29, which in practice is stamped A for identification.

The plate 18 is slidably secured to the rear side of the angle lever 29 by means of the bolt 19, and bears the indicator point 80, the position of which is shown uponthe'numbered scale on the angle lever 29. v

' Having thus "described my invention, what'I 1. In a crochet machine having stitch forming mechanism, .feeding mechanism includinga feed dog and means for reciprocating the feed dog longitudinally, said reciprocating means comprising elements movable relatively to each other to vary the longitudinal movement of the feed dog, a series of graduations on one of said elements, an indicator movable with the other element to denote on said graduations the variance in the relative positions of said two elements, separate means including a gear and a plurality of cams associated therewith for moving the feed dog into engagement with the work, said cams'being adjustable relative to the gear to vary their effect on the feed dog, an indicator connected to and movable in unison with each of said cams, a series of graduations associated with each of said cam indicators, 2, tappet, a tappet lever, means for moving said tappet lever to adjust the tappet into the path of any one of said cams, means for denoting the movement of said tappet adjusting means, an adjustable fabric edge guide, an indicator movable in unison with said fabric edge guide, and a series of graduations associated with said edge guide indicator, whereby suitable adju'stments may be made and definitely recorded for producing and directing the production of the results specified.

2. In a crochet machine having stitch forming mechanism, feeding mechanism including a feed 7 dog and means for reciprocating said feed dog longitudinally, said reciprocating means comprising a pair of elements movable relatively to each other to vary the longitudinal movement of the feed dog, an indicator movable in unison with one of said elements, a series of graduations associated with said indicator to denote the variance in the relative positions of said two elements, separate means including a gear and a plurality of cams associated therewith for moving the feed dog into engagement with the work, said cams being adjustable relative to the gear to vary their effect on the feed dog, an indicator connected to each of said cams, a series of graduations for each indicator carried by said gear, a tappet, a tappet lever, means for moving said tappet lever to adjust the tappet into the path of any one of said cams, means for denoting the movement of said tappet adjusting means, an adjustable fabric edge guide, an indicator movable in unison with said fabric edge guide, and a seriesof graduations associated with said edge guide indicator, whereby suitable adjustments may be made and definitely recorded for producing and directing the production of the results specified.

- FREDERIC JENNI. 

